Philip lindemeyer



(No Model.)

P. LINDEMEYER; PAPER BOX.

No. 466,792. Patented JanVIZ, 1892.

WITNESSES:

lJ'NITED STATES PATENT Genres.

PHILIP LINDEMEYER, OF BALTIMORE, MARYLAND, ASSIGNOR TO ISAACFRIEDENWALD.

PAPER BOX.

SPECIFICATION forming part of Letters Patent No. 466,792, dated January12, 1892.

Application filed August 20, 1889. Serial No. 821,876. (No model.)

T a, whom it may concern.-

Be it known that I, PHILIP LINDEMEYER, a resident of Baltimore, in theState of Mary land, have invented certain new and useful Improvements inPaper Boxes; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it pertains to make and use the same.

The object of the invention is to provide an improved paper box that canbe made from a single blank and closed and secured at each end byoverlapping pieces provided with double locks of a particular form.I-Ieretofore it has been found in boxes of this general character havinga single look that it was liable to become disengaged or unlocked byexternal or internal pressure, and particu larly during the operation offilling the same as for example, with candy. In such case it isdesirable to settle the contents of the partially-filled box by shakingor agitating it, and such operation has been very liable in priorconstructions to shake loose the look at the end opposite to that intowhich the candy or other material is being supplied. Furthermore,constructions employing a double lock have been liable to tear out, andparticularly where two slots were formed in one flap to receivecorresponding parts suitably shaped on an opposing flap. Double locksheretofore employed have also been liable to disengagement in fillingthe boxes, as above specified of single locks, owing to the want oflateral hooks shaped, situated, and operating as those herein set forth.

According to the present improvement a double lock is formed that willnot be loosened by pressure against either its exterior or interiorsurface, but which will be rather tightened thereby, and one which whilesecuring this important advantage also avoids the use of two slots inone flap and the weakening eitect of such construction.

The invention consists in the construction hereinafter described andpointed out.

In the accompanying drawings, which form part of this specification,Figure 1 is a perspective View of the improved box. Fig. 2 represents ablank cut in suitable form for making a box. Fig. 3 represents amodified form of the same, and Fig. 4 is a view of a modified detail.

The referencefigures 1 1 indicate portions of the blank which form twoopposite sides, and 2 2 indicate parts which form two sides at rightangles to the parts 1 1. 3 form the ends lying underneath thelocking-laps 4 4. The part 11 constitutes a usual feature ofconstruction, whereby the ends of a box-blank are secured together.

To form the lock, each flap 4 is provided with a tongue 5, having aprojection 6 at one side of the flap and with a slot 7 at the otherside, which slot is preferably made in angular form, as shown. Theprojection 6 is formed by cutting a curve 8 at the side of the tongue,which curve connects with a straight edge 10, cut as represented. Themain part of the slot 7 lies in a direction approximately at rightangles to the edge 10.

To form the box after the blank is prepared, it is first folded on thelines a b a b, so as to bring similar parts opposite each other, thesmall portion 11 being made to extend under the outer edge of 2 andglued or otherwise se-' cured thereto. The parts3 3 are then folded onthe line 0 c or d (I, so as to be at right angles with parts 1 and 2.Thus folded, they overlap each other and constitute the main portion ofthe ends of the box. The parts 4 4 are subsequently folded down uponline 0 c or cl d, so as to bring the right-hand tongues over theleft-hand slots, and vice versa. By springing the adjacent parts 4 4laterally in opposite directions each tongue can readily be entered inits corresponding slot, the hook or projection 6 slipping through theinner end of the slot, and the parts 4 4 are then moved back laterallyuntil the straight edges 10 10 t are in contact, as represented inFig. 1. These edges 10 1O cross each other at an acute angle, as shown,and form a stop to prevent the accidental removal of the hooks orprojections 6 from the slots. These projections are in curved form (theymay be angular, but should have a hook form)and engage the innor ends ofthe slots, which they cannot do unless they are so shaped that whenentered in the slots their extremities can slip back behind the edge ofthe slot by which they were passed in entering the same-that is to Theparts 3 say, if they were not made in hook form substantially as shownand described. Such projections will engage the wall of the slot at itsend all the more firmly when pressure is applied to the end of the box,and they cannot be drawn out as are projections which have their edgesextending only in the direction in which they are entered in the slots.The locking connection is readily made by slightly bending or springingthe flaps in which are formed the tongues and slots and thrusting thetongues into the corresponding slots, and this connection can be unmadewhen desired without difficulty, while the crossing of the edges 10 10and their consequent engagement and the alternate overlapping of theflaps on their two sides effectually prevent accidental separation.

As indicated in the drawings, my improved lap and lock are adapted toboxes of dissimilar forms, Figs. 1 and 2 indicating blanks suitable forrectangular and wedge-shapedboXes, respectively, and the improvement istherefore not limited in this respect. It is also obvious that the sizeof the tongues and slots may be varied and that the latter may be madein one straight line and also by cutting out or removing a part of thematerial. The particular formof the curve is not essential, nor is itessential that edges 10 10 should be made straight, as they may beformed as indicated in Fig. 4: or otherwise shaped. It is furtherobvious that the locking devices may be omitted at one end of the boxand that a plain end piece secured in any ordinary way may besubstituted.

It may be noted that the usual strain or pull upon the wall of the slots7, caused .by

pressure from within the box, for example, is not in the direction ofthe slot, but transverse to its direction, as indicated by the arrow. Toadd strength to the parts in the direction of the slot, however, it isonly necessary to curve the lines 10 as in Fig. 4; but thisis notessential.

Having thus described my invention, what I desire to secure by LettersPatent is as follows:

1. A folded box having its ends composed in part of flaps provided withthe tongues having lateral hooks and with slots, the hooks of thetongues engaging the edge of the slot, said flaps havingtheir edgesbetween the slots running in the same direction as the tongues and lyingin planes which cross each other at an acute angle, whereby the edgesabut throughout their whole length and form a practical stop,substantially as set forth;

2. A blank comprising similar parts in the usual form, adapted toconstitute the sides and ends of the box, and having flaps adapted toconstitute in part the ends provided with tongues having lateral hooksand with slots, the hooks of the tongues being suitable to engage theedges of the slots, said flaps having each an edge 10 running in thesame direction as the tongue and adapted when placed in operativeposition to cross the other at an acute angle, substantially as setforth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

PHILIP LINDEMEYER. Witnesses:

FRANK DE S. BENZINGER, JosDEUTsoH.

